Automatic regulator for carbureters.



W. W. GREEN.

AUTOMATIC REGULATOR FOR GABBUBETBRS. PPLIOATION FILED Nov.1o, 1913.

1,1 10,131, Patented Sept. 8, 1914.

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f/zess es /mww' `wir-MAM W. GREEN, or Nuns, mzicHIGyAN.

AUTOMATIC REGULATOR FOR CARBURETERS.

Specification of Letters Patent.

Patented Sept. 8, 1914.

Application filed November 10, 1913. Serial N o. 800,085.

To (1I/ fr/nfm 'it ma:A1 concern:

lle it known that I, IVILLIAM W. GREEN, a citizen oi' the, UnitedStates, and a resident of Niles, county of Bei-rien, and State ofMichigan, have invented certain new and useful improvements in AutomaticRegulators tor Carbureters, of which the following is declared to be afull, clear, and exact descriptirm. l

This invention relates to carbureters for internal '-omhustion enginesand designs to provide means for automatically regulating the flow ifgasolene through the car-bureter. 'l'hose skilled in this art are awarethat a greater ilow of gasolene is required to start gasoleue engines incold weather than in r`warm weather, and much diiiiculty is encounteredin adjusting the carbureter so that the proper llow .of gasolene may behad. This regulation of the flow is usually conf trrllcd by a needlevalve, and it is practically inuiossiblc to reset the valve after it hasbeen adjusted to permit a larger flow, so that much annoyance and enginetrouble is occasioned.

The primary object of this invention is to provide means forautomatically adjusting the needle valve'of the carbureter, which meansreceives its action from the changes of temperature.

To such end this invention consists in the several novel featureshereinafter set `forth and claimed.

The invention is clearly illustrated in the accompanying drawing inwhich Figure 1, is a side elevation of a fragment of a motor vehicle,the engine and its carbureter, and showing one form of the presentinvention applied thereto; Fig. 2, is a detail cross section taken online 2- 2, Fig. 1; and Fig. 3, is a plan of a needle valve stem, a crankthereon and a valve actuating member. i

Referring to said drawings, 10 designates an engine, of the internalcombustion type, 1l the hood, 12 the radiator, and 13 the dash of amotor vehicle; 14 designates the intake pipe of the engine, and 15 thecarbureter, which may be constructed in accordance with any of the wellknown forms embodying a needle valve 1G, having a needle valve stein orspindle 17, screw threaded in a support 1g, and arranged to regulate theflow of gasolene through the carbureter. By

screwing it down toward its seat, less gasolene is admitted, and byunscrewing it, more gasolene is admitted with the air to form therequired mixture or charge for the engine. In warm weather the passagethrou h this needle valve is closed more than in co d weather, and this.adjustment has heretofore been done manually and more or lessimperfectly.

In my novel automaticy regulating mechanism, onef'or more readilyexpansible'and contracti-ble members 20, 21, 22, are employed, which aresupported within the hood 11, and one member of which is.' connected tothe needle valve spindle of the carburetor, as, for instance,by a crank23. In the form shown I provid(I two supports 24, 25 for the members 20,21, 22, which members are here shown as comprising rods, preferablyconstructed of brass, so as to obtain 'a long range expansibility, andsaid supports are shown as secured to the dash 13, and radiator 12,respectively.

24, and its other end is pivotally secured to one end of a lever 27,fulcrumed, between its ends, on "an arm 28, of the support 25. To theother end of the lever 27 is pivotally secured one end of the second rod21, whose other end is pivotally secured to one end of a second lever29, fulcrumed between its ends, upon a lug 30, of the support 24. Oneend of the third rod 22, is'pivotally secured to the other end of thelever 29, and its other end is pivotally secured to the end `of thecrank 23. A set screw 31, threaded in the crank and Vbea-ring on theneedle valve stem or spindle, provides means for adjustably connectinerthe crank with the Stem. By a1- ranging the fulcrums of the levers 27,29, as shown, the rod attached to the long end of each lever is movedbodily through a greater distance than the one attached to the shortarms of the levers, consequently through the expansion and contractionof the rods the crank 23, may be moved sufficiently to properly operatethe needle valve stem.

The arm 28 of the support 25, is preferably of light construction, sothat 1tmay y'ield when the rods have been subjected to the temperaturesradiating from .the enginesv when running, and have been expandedsufficiently to turn the needle valve stem far enough to cut down the owof gasolene, when the engine is running. The yieldable arm permitsfurther expansion of the rods without affecting the valve, and anadjustable connection 32, is provided between the One end of the .rod20, is'secured to a lug 26, on the support y'the rods expand, the rod20, swinging the lever 27, and moving the rod 21, onward, which, becauseof its expansion, in addition tothe movement imparted to it by the lever27, swings the lever 29, through a greater arc than the lever 27, andthis movement is again multiplied in the expansive movement of therod'22, whereby the crank 23, is turned suiiiciently to move the needlevalve stem closer to its seat and thereby re-` -duce the {iow ofgasolene through the carbureter. A stop is pro vided for limiting thevalve closing action of the rods at the proper point, and in the formshown, the lever 29, strikes the support 24, at such time. Any furtherexpansion of the rods is taken up by the arm 28, of the support 25.

From the above it will be seen that the needle valve is openedconsiderably on a cold day, by reason of the contraction of the rodswhen the engine is not running, thereby admitting more gasolene throughthe carbureter when the engine is being started, and that w en startedand heated up the valve is clos d down to the proper place. On a warmday the valve is automatically closed more than on a cold day, by reasonof the expansion of the rods, thus admitting less gasolene thanl on acold day, when starting the engine and when the engine has started andis heated up, the expanding rods closi` down the valve to its pro rrunning order as before.

ore or less variationis possible without departing from the spirit ofthis invention and I desire thereforenot to limit myself to the exactform of the invention shown and described, but intend in the followingclaims to point out all of the invention disclosed herein.

I claim as new and desire to secure by Letters Patent 1. Means forautomatically regulating needle valve-controlled carbureters foriuternal combustion engines of motor vehicles, comprising 'a pluralityof contractible and expansible rods, one of which has a iixedlysupported end, motion multiplying levers connecting said rods and acrank on the needle valve stem, connected to and operated by the rodfarthest removed from the rod having the fixedend.

2. Means for automatically regulating valve-controlled carbureters forinternal combustion engines, comprising' expansible and contractiblemembers, one of which has a fixed end, opera-tive connectionstherebetween, a stop for limiting movement of said members in onedirection, and a connection between one of said members` and thecontrolling valve of the carbureter.

3. Means for automatically regulating valve-controlled carbureters forinternal combustion engines, comprising a plurality of contractible andexpansible rods, one of which has a fixed end, throw increasing leversfor said rods, one of which is carried by a yieldable support, a stopfor limiting the movement of said rods, and an operative connectionbetween the last one of said rods and the valve of the carbureter.

WILLIAM W. GREEN.

Witnesses:

A. J. BROWN, W. GARDNER, J r.

